合适的钻 / Suitable drill

Suitable drill , inspired by Chinese ancient manual tool, utilizes grip power of hands which are converted to drilling power. In compare with conventional electric drill which has clear Shortcomings，Suitable drill without complex structure has some virtues, it is a green product that don’t consume electricity ,more safer and simpler , and especially suitable for younger users who love DIY . Moreover, in particular, the S-drill may be used safely under special condition like water or moisture . In a certain sense, this new design of drills recover vintage style of working mode through a new effective design.